Athlete's foot and ringworm are some common types of skin fungus that many people will get at least once in their lifetime.

The human itch mite infects people of all ages, social classes and races the world over. The American Osteopathic College of Dermatology estimates that more than 300 million people become infested with the human itch mite each year.

African Americans have sensitive skin and may suffer from a wide variety of skin disorders. For some, applying skin care products or shaving can cause skin conditions to develop.

Yellow skin -- also referred to as jaundice -- is the result of too much bilirubin. According to the National Institutes of Health, bilirubin is a yellow chemical found in hemoglobin -- the substance responsible for carrying oxygen to your red blood cells.

As people age, their skin usually takes a direct hit, if not with more wrinkles then with more bumps and discolorations. Cherry angiomas, also called cherry hemangiomas, are, like their name suggests, cherry-colored flat or slightly raised dots that generally grow no larger than 1/4 inch in diameter.

Topical vitamin C, also referred to as L-ascorbic acid, is a topical antioxidant that has been shown to increase collagen production, smooth the appearance of fine lines and wrinkles and even skin discoloration, according to Skin & Aging magazine.